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| 1 | 生态干扰度:一种评价植被天然性程度的方法显示文摘地球上现存的植物或森林群落都是植被与其环境长期适应及人类长期干扰影响的结果 ,因此 ,现实的植被反映着历史上人类对它们不同程度的影响。‘生态干扰’的概念常常被用来描述历史上人类对植被或森林影响的大小 ,即‘生态干扰度’;或用来表示现实植被离开它的‘天然植被’的距离 ,即现实植被的‘天然性程度’。如此的‘天然植被’可以是 :( 1 )历史上从未受过人类任何干扰的‘原始植被’;( 2 )基于当前立地的‘潜在的自然植被’。然而 ,成百上千年以来人类对自然的利用干扰 ,致使真正的‘原始植被’现在几乎无处可寻。因此 ,‘潜在的自然植被’被用来作为生态干扰度估计或植被天然性程度评价的参照系。作为一种很实用的生态分析手段 ,生态干扰度的方法已被广泛地应用在农、林、水、景观、城市及自然保护等诸多领域的生态评价上。为此 ,本文论述了生态干扰度的概念、原理、方法和应用实例。 | 李迈和 Norbert Krauchi 杨健 | 2002 | 地理科学进展2002，21，5： | 53 |
| 2 | 全球高山林线研究现状与发展方向显示文摘当山体达到一定高度时出现的森林分布上限———高山林线,归根结底是一条低温界限。逾百年高山林线的观测与研究,旨在阐明高山林线成因以恢复气候高山林线。迄今出现的各种(可归为5类)高山林线成因假说,虽然每一种都可以解释一定地域的高山林线现象,但在全球尺度上,仍然缺乏一种可以普遍解释全球高山林线现象的假说和理论。另外,由于高山区域较少的人类干扰及短(海拔)距离内显著的环境因子梯度、结合高山林线特殊的结构、功能及对气候变化的高度敏感性,林线研究已经成为全球气候变化研究的热点区域之一。本文综述了全球高山林线知识现状,并对将来高山林线研究提出了一些建议。 | 李迈和 Norbert Krauchi | 2005 | 四川林业科技2005，26，4： | 42 |
| 3 | Recent research and developments on wrought magnesium alloys显示文摘Wrought magnesium alloys attract special interests as lightweight structural material due to their homogeneous microstructure and enhanced mechanical properties compared to as-cast alloys.In this contribution,recent research and developments on wrought magnesium alloys are reviewed from the viewpoint of the alloy design,focusing on Mg-Al,Mg-Zn and Mg-rare earth(RE)systems.The effects of different alloying elements on the microstructure and mechanical properties are described considering their strengthening mechanisms,e.g.grain refinement,precipitation and texture hardening effect.Finally,the new alloy design and also the future research of wrought magnesium alloys to improve their mechanical properties are discussed. | Sihang You Yuanding Huang Karl Ulrich Kainer Norbert Hort | 2017 | Journal of Magnesium and Alloys2017，5，3： | 43 |
| 4 | 地球暖化促进植物迁移与入侵显示文摘在当今快速的全球气候变化 ,特别是快速而急剧的地球暖化情况下 ,现有植物及其系统被迫 :1)重新适应这种变化了及仍在变化着的环境条件 ;2 )往高海拔及极地方向迁移寻找合适的生存环境 ;或者 3)因其迁移的速度赶不上气候变化的速度而消亡。同时 ,气温升高和降水模式 (包括降水量及其分配 )的变化 ,以及与此相关联的干扰型式 (包括干扰种类、强度及延续时间 )的变化 ,一方面将使现有植物及其生态系统对外来生物的抗性弱化 ,另一方面将激活外来物种的活性 ,导致外来生物的快速扩散与大规模入侵 ,进而排挤和“杀死”当地乡土种 ,减少生物多样性 ,改变原有生态系统的组成、结构和功能 ,最终导致严重的社会经济与生态环境问题。在制定域、国家及全球经济与环境政策时 ,应充分考虑到这些问题 。 | 钟永德 李迈和 Norbert Kraeuchi | 2004 | 地理研究2004，23，3： | 34 |
| 5 | Novel treatment options for perforations of the upper gastrointestinal tract:Endoscopic vacuum therapy and over-the-scope clips显示文摘Endoscopic management of leakages and perforations of the upper gastrointestinal tract has gained great importance as it avoids the morbidity and mortality of surgical intervention.In the past years,covered selfexpanding metal stents were the mainstay of endoscopic therapy.However,two new techniques are now available that enlarge the possibilities of defect closure:endoscopic vacuum therapy(EVT),and over-the-scope clip(OTSC).EVT is performed by mounting a polyurethane sponge on a gastric tube and placing it into the leakage.Continuous suction is applied via the tube resulting in effective drainage of the cavity and the induction of wound healing,comparable to the application of vacuum therapy in cutaneous wounds.The system is changed every 3-5 d.The overall success rate of EVT in the literature ranges from 84%to 100%,with a mean of 90%;only few complications have been reported.OTSCs are loaded on a transparent cap which is mounted on the tip of a standard endoscope.By bringing the edges of the perforation into the cap,by suction or by dedicated devices,such as anchor or twin grasper,the OTSC can be placed to close the perforation.For acute endoscopy associated perforations,the mean success rate is 90%(range:70%-100%).For other types of perforations(postoperative,other chronic leaks and fistulas)success rates are somewhat lower(68%,and59%,respectively).Only few complications have been reported.Although first reports are promising,further studies are needed to define the exact role of EVT and OTSC in treatment algorithms of upper gastrointestinal perforations. | Rudolf Mennigen Norbert Senninger Mike G Laukoetter | 2014 | World Journal of Gastroenterology2014，20，24： | 25 |
| 6 | 白子菜醋酸乙酯部位的化学成分研究显示文摘目的研究白子菜Gynura divaricata地上部分醋酸乙酯萃取部位的化学成分。方法采用不同柱色谱技术进行分离纯化,结合MS和NMR数据进行结构鉴定。结果从白子菜地上部分80%乙醇回流提取物的醋酸乙酯萃取部位中分离纯化得到14个化合物,分别鉴定为丁二酸(1)、丁二酸单甲酯(2)、丁二酸单乙酯(3)、丁二酸甲酯乙酯(4)、对羟基苯甲酸(5)、水杨酸(6)、异香草酸(7)、对香豆酸(8)、马栗树皮素(9)、槲皮素(10)、山柰酚(11)、异槲皮苷(12)、紫云英苷(13)、芦丁(14)。结论化合物1~4、6~9为首次从该植物中分离得到。 | 陈剑 MANGELINCKX Sven 吕寒 李维林 DEKIMPE Norbert 王峥涛 | 2013 | 中草药2013，44，5： | 22 |
| 7 | 肾脏病学的新创意:“肾脏疾病:改善全球预后”(KDIGO)显示文摘慢性肾脏病(CKD)是世界范围的医疗和公共卫生问题,并开始呈现流行性的特点.美国肾脏数据系统(USRDS)的数据提示,终末期肾衰的发病率呈上升趋势,因此对于这一问题的重视日益增加.根据近期USRDS登记系统提供的资料,世界范围内需要肾脏替代治疗(RRT)的终末期肾病(ESRD)患者数目持续上升,其中我国台湾、美国和日本最多(254~365人/100万人)[1].卡塔尔和巴斯克地区的儿童患病率最高,分别为33.7人/100万人和22.7人/100万人;在大于等于20岁患者中患病率最高的是卡塔尔、美国和台湾.在欧洲,德国的患病率最高,2000年为175人/100万人.在RRT仍在发展中的东欧,报道的患病率低于西欧[2]. | Norbert Lameire Garabed Eknoyan Rashad Barsoum Kai-Uwe Eckardt Adeera Levin Nathan Levin Francesco Locatelli Alison Macleod Raymond Vanholder Rowan Walker Haiyan Wang 张路霞 王海燕 | 2005 | 中华肾脏病杂志2005，21，12： | 19 |
| 8 | Role of multi-microalloying by rare earth elements in ductilization of magnesium alloys显示文摘The present work investigates the influences of microalloying with rare earths on the mechanical properties of magnesium alloys.The amount of each rare earth element is controlled below 0.4 wt.%in order not to increase the cost of alloy largely.The synergic effects from the multi-microalloying with rare earths on the mechanical properties are explored.The obtained results show that the as-cast magnesium alloys multi-microalloying with rare earths possesses a quite high ductility with a tensile strain up to 25-30%at room temperature.Moreover,these alloys exhibit much better corrosion resistance than AZ31 alloy.The preliminary in situ neutron diffractions on the deformation of these alloys indicate that the multi-microalloying with rare earths seems to be beneficial for the activation of more slip systems.The deformation becomes more homogeneous and the resultant textures after deformation are weakened. | Yuanding Huang Weimin Gan Karl Ulrich Kainer Norbert Hort | 2014 | Journal of Magnesium and Alloys2014，2，1： | 19 |
| 9 | Chloroplast Proteomics and the Compartmentation of Plastidial Isoprenoid Biosynthetic Pathways显示文摘proteomic 地里的最近的进展允许高产量的实验在叶绿体样品上被进行。许多 proteomic 调查集中了于整个叶绿体或 sub-plastidial 部分。迄今为止,植物蛋白质数据库(PPDB,阳光等, 2009 ) 介绍在网上可得到的最彻底的叶绿体 proteome。然而,在不同 sub-plastidial 分隔空间被识别的许多蛋白质的精确本地化仍然保持假想。为西班牙耶劳岛之旧称等。(2009 ) 去了进关于他们在由使用作为光谱的数知道的一条半量的 proteomic 途径的叶绿体以内的精确本地化的 Arabidopsis thaliana 叶绿体蛋白质的知识进一步的步。他们的 proteomic 策略基于精确的团和时间标签(AMT ) 数据库途径,他们建立了 AT_CHLORO,有 sub-plastidial 本地化的一个全面叶绿体 proteome 数据库和信封蛋白质的 curated 信息。比较这二个广泛的数据库,我们这里集中于涉及叶绿体特定的 isoprenoids 的合成的大约 100 酶。众所周知的小径(即甲基赤藻糖醇磷酸盐 biosynthetic 小径的分隔,在叶绿体以内的 tetrapyrroles 和叶绿素生合成和故障) 验证光谱基于计数的策略。一样的策略然后被用来在叶绿体以内识别类胡萝卜素和 prenylquinones 的生合成的精确本地化(即在信封膜,基质,或 thylakoids ) 那仍然保持不清楚直到现在。 | Jacques Joyard Myriam Ferro Christophe Masselon Daphne Seigneurin-Berny Daniel Salvi Jerome Garin Norbert Rolland | 2009 | Molecular Plant2009，2，6： | 15 |
| 10 | 藏毛窦发病率和远期复发率现况及其影响因素分析显示文摘目的调查德国部队中藏毛窦的发病率和术后远期复发率的现状及其发展变化趋势,分析不同手术治疗方法、体格状况和吸烟量等因素对藏毛窦的发病率和术后远期复发率的影响。方法对德国三家部队医院1980至1996年收治的所有藏毛窦患者的资料进行统计,随机抽取其中500例患者进行随访。结果德国部队中藏毛窦的发病率由1985年的0.3/1000上升到2007年的2.4/1000。随机抽取的500例患者中2例死亡,498例接受了随访。其术后复发率从1981年的33%,到1986年的23%,再到1996年的12%,呈明显下降趋势(P=0.01)。藏毛窦切除后行开放愈合的复发率为16.8%,显著低于行一期缝合的复发率31.0%(P〈0.01)。部队中人均体质量每十年增加1kg,德国国民人均体质量每十年增加1.9kg,但是体质量的增加与藏毛窦复发率之间无显著相关性(P=0.72)。每天吸烟20支以上者藏毛窦的复发率比吸烟≤20支者显著升高(P=0.015)。结论在藏毛窦的术后复发率下降,特别是切除后开放愈合的术后复发率下降的同时,藏毛窦的发病率上升了近十倍。 | Theo Evers Dietrich Doll Edouard Matevossian Sebastian Noe Konrad Neumann 李挥力 Norbert Huser Rainer Ludde Sebastian Hoffmann Bjorn Dirk Krapohl | 2011 | 中华外科杂志2011，49，9： | 14 |
| 11 | 基于光伏建筑一体化(BIPV)的智慧化产能建筑设计研究显示文摘建筑通过对太阳能等可再生能源的利用,从传统的能源消耗方转变为产能—用能结合体,产能建筑通过满足自身能耗需求和富余电量上网,可以进一步转化为小型能源共享站。以SDC2018太阳能十项全能竞赛参赛项目'C-House'为例,探索基于光伏建筑一体化的智慧化产能房屋设计方法,将降低能耗与提高产能相结合,在保证达到产能目标的同时,兼顾建筑美观性要求;研究智慧化产能用能方式,利用智慧化储能系统和房屋控制系统,提高自用电比例。仿真模拟结果和实地建造后的测试结果证明了C-House能够实现产能目标。 | 张宏 Manfred Norbert FISCH 胡心怡 Elisabeth ENDRES 罗申 | 2020 | 供用电2020，37，8： | 14 |
| 12 | 特发性脊柱侧凸King、Lenke和PUMC临床分型的应用比较显示文摘目的比较特发性脊柱侧凸King、Lenke和PUMC分型的全面性及其对手术的指导价值。方法回顾性分析在巴塞罗那SantJoanDeDéu医院接受手术治疗的特发性脊柱侧凸患者145例的临床及影像学资料。所有病例均进行King、Lenke和PUMC分型,比较手术原则与三种分型方法的符合率及术后失代偿的发生情况。结果King分型能对全部病例中的122例进行分型,有23例无法应用King分型;而Lenke分型和PUMC分型均能对全部病例进行分型。145例患者中,手术原则符合King分型者99例(68.3%),符合Lenke分型者120例(82.8%),符合PUMC分型者107例(73.8%)。95例患者随访3~96个月,平均29.6个月。其中手术原则符合King分型、Lenke分型和PUMC分型融合范围而于术后与随访时发生冠状面躯干失平衡(失代偿)的发生率分别为26.3%(26/99)和13.2%(9/68)、30.8%(37/120)和12.5%(10/80)、14.0%(15/107)和2.7%(2/74),符合PUMC分型而发生冠状面躯干失平衡的发生率与符合King分型、Lenke分型者比较差异均有统计学意义(P<0.05)。上胸弯和主胸弯的柔韧性与胸腰弯和腰弯比较差异有统计学意义(P<0.05)。结论特发性脊柱侧凸的PUMC分型与Lenke分型比King分型更全面,PUMC分型比King分型和Lenke分型更具手术指导意义。对不同部位的脊柱侧凸采用统一的凸侧Bending位X线片上Cobb角超过25°来定义结构性侧凸并不合适。 | 邱贵兴 于斌 Norbert Ventura 仉建国 王以朋 翁习生 石志才 | 2006 | 中华骨科杂志2006，26，3： | 13 |
| 13 | Global Wheat Head Detection(GWHD)Dataset:A Large and Diverse Dataset of High-Resolution RGB-Labelled Images to Develop and Benchmark Wheat Head Detection Methods显示文摘The detection of wheat heads in plant images is an important task for estimating pertinent wheat traits including head population density and head characteristics such as health,size,maturity stage,and the presence of awns.Several studies have developed methods for wheat head detection from high-resolution RGB imagery based on machine learning algorithms.However,these methods have generally been calibrated and validated on limited datasets.High variability in observational conditions,genotypic differences,development stages,and head orientation makes wheat head detection a challenge for computer vision.Further,possible blurring due to motion or wind and overlap between heads for dense populations make this task even more complex.Through a joint international collaborative effort,we have built a large,diverse,and well-labelled dataset of wheat images,called the Global Wheat Head Detection(GWHD)dataset.It contains 4700 high-resolution RGB images and 190000 labelled wheat heads collected from several countries around the world at different growth stages with a wide range of genotypes.Guidelines for image acquisition,associating minimum metadata to respect FAIR principles,and consistent head labelling methods are proposed when developing new head detection datasets.The GWHD dataset is publicly available at http://gffzzef49fa24bca249bbhxvfb0b09wc9n6q9c.ffgz.tsg.suse.edu.cn/and aimed at developing and benchmarking methods for wheat head detection. | Etienne David Simon Madec Pouria Sadeghi-Tehran Helge Aasen Bangyou Zheng Shouyang Liu Norbert Kirchgessner Goro Ishikawa Koichi Nagasawa Minhajul A.Badhon Curtis Pozniak Benoit de Solan Andreas Hund Scott C.Chapman Frédéric Baret Ian Stavness Wei Guo | 2020 | Plant Phenomics2020，2，1： | 13 |
| 14 | The enhanced X-ray Timing and Polarimetry mission—eXTP显示文摘In this paper we present the enhanced X-ray Timing and Polarimetry mission—eXTP. eXTP is a space science mission designed to study fundamental physics under extreme conditions of density, gravity and magnetism. The mission aims at determining the equation of state of matter at supra-nuclear density, measuring effects of QED, and understanding the dynamics of matter in strong-field gravity. In addition to investigating fundamental physics, eXTP will be a very powerful observatory for astrophysics that will provide observations of unprecedented quality on a variety of galactic and extragalactic objects. In particular, its wide field monitoring capabilities will be highly instrumental to detect the electro-magnetic counterparts of gravitational wave sources.The paper provides a detailed description of:(1) the technological and technical aspects, and the expected performance of the instruments of the scientific payload;(2) the elements and functions of the mission, from the spacecraft to the ground segment. | ShuangNan Zhang Andrea Santangelo Marco Feroci YuPeng Xu FangJun Lu Yong Chen Hua Feng Shu Zhang Sφren Brandt Margarita Hernanz Luca Baldini Enrico Bozzo Riccardo Campana Alessandra De Rosa YongWei Dong Yuri Evangelista Vladimir Karas Norbert Meidinger Aline Meuris Kirpal Nandra Teng Pan Giovanni Pareschi Piotr Orleanski QiuShi Huang Stephane Schanne Giorgia Sironi Daniele Spiga Jiri Svoboda Gianpiero Tagliaferri Christoph Tenzer Andrea Vacchi Silvia Zane Dave Walton ZhanShan Wang Berend Winter Xin Wu Jean J.M.in't Zand Mahdi Ahangarianabhari Giovanni Ambrosi Filippo Ambrosino Marco Barbera Stefano Basso Jörg Bayer Ronaldo Bellazzini Pierluigi Bellutti Bruna Bertucci Giuseppe Bertuccio Giacomo Borghi XueLei Cao Franck Cadoux Francesco Ceraudo TianXiang Chen Yu Peng Chen Jerome Chevenez Marta Civitani Wei Cui WeiWei Cui Thomas Dauser Ettore Del Monte Sergio Di Cosimo Sebastian Diebold Victor Doroshenko Michal Dovciak YuanYuan Du Lorenzo Ducci QingMei Fan Yannick Favre Fabio Fuschino JoséLuis Ga'lvez Min Gao MingYu Ge Olivier Gevin Marco Grassi QuanYing Gu YuDong Gu DaWei Han Bin Hong Wei Hu Long Ji ShuMei Jia WeiChun Jiang Thomas Kennedy Ingo Kreykenbohm Irfan Kuvvetli Claudio Labanti Luca Latronico Gang Li MaoShun Li Xian Li Wei Li ZhengWei Li Olivier Limousin HongWei Liu XiaoJing Liu Bo Lu Tao Luo Daniele Macera Piero Malcovati Adrian Martindale Malgorzata Michalska Bin Meng Massimo Minuti Alfredo Morbidini Fabio Muleri Stephane Paltani Emanuele Perinati Antonino Picciotto Claudio Piemonte JinLu Qu Alexandre Rachevski Irina Rashevskaya Jerome Rodriguez Thomas Schanz ZhengXiang Shen LiZhi Sheng JiangBo Song LiMing Song Carmelo Sgro Liang Sun Ying Tan Phil Uttley Bo Wang DianLong Wang GuoFeng Wang Juan Wang LangPing Wang YuSa Wang Anna L.Watts XiangYang Wen Jörn Wilms ShaoLin Xiong JiaWei Yang Sheng Yang YanJi Yang Nian Yu WenDa Zhang Gianluigi Zampa Nicola Zampa Andrzej A.Zdziarski AiMei Zhang ChengMo Zhang Fan Zhang Long Zhang Tong Zhang Yi Zhang XiaoLi Zhang ZiLiang Zhang BaoSheng Zhao ShiJie Zheng Yu Peng Zhou Nicola Zorzi J.Frans Zwart | 2019 | Science China(Physics,Mechanics & Astronomy)2019，62，2： | 11 |
| 15 | 永磁直线电机的模型参考自适应控制显示文摘推导永磁直线电机的简化数学模型,运用Lyapunov稳定性理论设计一个模型参考自适应控制器,最后进行计算机仿真研究。结果表明,与传统PID调节器相比,该方法能使系统具有更好的动态性能及较高的稳态精度,并对电机参数和外界扰动具有很强的鲁棒性。 | 陈渊睿 吴捷 Norbert C.Cheung | 2003 | 华南理工大学学报(自然科学版)2003，31，6： | 11 |
| 16 | 源于近端股骨间充质干细胞免疫抑制作用的研究显示文摘目的探讨源于成人近端股骨的间充质干细胞(MSC)是否具有免疫抑制功能,为临床移植物抗宿主病的防治寻找理想的细胞储备库。方法从全髋关节置换术患者的近端股骨中分离并培养MSC,将不同数量的细胞直接或以Transwell法加入混合淋巴细胞反应(MLR)中,检测MSC对外周血淋巴细胞(PBL)增殖水平的影响。以ELISA法及抗体中和法探讨细胞因子TGFβ1在MSC免疫调节中的作用。结果3×103、1×104、3×104、1×105个源于近端股骨的MSC对PBL增殖的抑制率分别为62%±18%、38%±4%、31%±16%、28%±12%,与采自髂骨骨髓穿刺物MSC的抑制作用相比差异无统计学意义(均P>0.05),后者对PBL的增殖抑制率为58%±12%、37%±8%、28%±6%、27%±6%;以0.2μm的微孔膜对MSC与MLR进行分隔,3×104及1×104个MSC对PBL的增殖抑制率为36%±8%和53%±12%;在ELISA实验中,MSC单独培养,MSC与MLR直接接触,或经Transwell共培养的这3种上清中转化生长因子(TGF)β1的表达水平差异无统计学意义,加入浓度递增的TGFβ1抗体不能逆转MSC对PBL增殖的抑制作用。结论源于近端股骨的MSC具有一定的免疫抑制功能,除TGFβ1外其他可溶性因子可能介导这一作用。 | 张翼鷟 Loic Fouillard Alain Chapel Morad Bensidhoum Christelle Mazurier Aish Nasef Sandrine Bouchet Manuel Lopez Dominique Thierry Norbert Cclaucle Gorin 达万明 | 2005 | 中华医学杂志2005，85，39： | 11 |
| 17 | 双能CT的基本原理、应用和未来展望(英文)显示文摘断层影像(CT)的图像对比度与扫描所用的X光源能谱分布有很大关系。传统CT使用具有能谱分布的一个光源进行成像,有时会出现信息模糊致使两种不同材料在CT图像上完全相同。双能CT使用两个不同分布的能谱对物体进行成像,能够消除单能谱情况下的信息模糊。虽然双能CT的基本概念由来已久,但最近商业系统的出现使双能CT迅速成为一个热点。我们首先概述了双能CT的基本物理原理和双能信号处理方法,包括促使双能CT进入现代医学成像的关键技术。其次,双能CT的应用已非常广泛,本文从其在临床应用角度进行了详细介绍使读者有所了解。最后,我们简要探讨了当前的两个技术发展领域:光子技术探测器和技术合成CT。 | Adam S.WANG Scott S.HSIEH Norbert J.PELCa | 2012 | CT理论与应用研究(中英文)2012，21，3： | 11 |
| 18 | Charge Transport in Disordered Graphene-Based Low Dimensional Materials显示文摘Two-dimensional graphene,carbon nanotubes,and graphene nanoribbons represent a novel class of low dimensional materials that could serve as building blocks for future carbon-based nanoelectronics.Although these systems share a similar underlying electronic structure,whose exact details depend on confi nement effects,crucial differences emerge when disorder comes into play.In this review,we consider the transport properties of these materials,with particular emphasis on the case of graphene nanoribbons.After summarizing the electronic and transport properties of defect-free systems,we focus on the effects of a model disorder potential(Anderson-type),and illustrate how transport properties are sensitive to the underlying symmetry.We provide analytical expressions for the elastic mean free path of carbon nanotubes and graphene nanoribbons,and discuss the onset of weak and strong localization regimes,which are genuinely dependent on the transport dimensionality.We also consider the effects of edge disorder and roughness for graphene nanoribbons in relation to their armchair or zigzag orientation. | Alessandro Cresti Norbert Nemec Blanca Biel Gabriel Niebler François Triozon Gianaurelio Cuniberti Stephan Roche | 2008 | Nano Research2008，1，5： | 10 |
| 19 | Global Warming: Can Existing Reserves Really Preserve Current Levels of Biological Diversity?显示文摘Paleoecological 证据和 paleoclimatic 记录显示在有在最后冻结成冰以后的增加的温度的举起在纬度和向上的移动有植物杆病房迁居。最近的研究显示出在在生活系统上有显著效果的过去的 100 年过时的人或物上的那全球温暖。当前的全球温暖在许多植物和动物的范围正在引起一个杆病房和向上的移动。与另外的全球变化相关,气候变化正在威胁大量植物和动物种类的幸存。这提出这个问题:存在储备能确实保存从长远的观点看给气候变化的现在的快速的步的生物差异的当前的层次吗?现在的纸在对全球气候变化的植物和动物的回答的上下文处理这个问题,基于文学评论。因而,我们建议向杆或向更高的高度扩展储备,到转移他们的范围赶上全球温暖的许可证种类…… | Mai-He Li Norbert Krǎuchi Su-Ping Gao | 2006 | Journal of Integrative Plant Biology2006，48，3： | 9 |
| 20 | Bifurcation and Chaos Analysis of Nonlinear Rotor System with Axial-grooved Gas-lubricated Journal Bearing Support显示文摘Axial-grooved gas-lubricated journal bearings have been widely applied to precision instrument due to their high accuracy, low friction, low noise and high stability. The rotor system with axial-grooved gas-lubricated journal bearing support is a typical nonlinear dynamic system. The nonlinear analysis measures have to be adopted to analyze the behaviors of the axial-grooved gas-lubricated journal bearing-rotor nonlinear system as the linear analysis measures fail. The bifurcation and chaos of nonlinear rotor system with three axial-grooved gas-lubricated journal bearing support are investigated by nonlinear dynamics theory. A time-dependent mathematical model is established to describe the pressure distribution in the axial-grooved compressible gas-lubricated journal bearing. The time-dependent compressible gas-lubricated Reynolds equation is solved by the differential transformation method. The gyroscopic effect of the rotor supported by gas-lubricated journal bearing with three axial grooves is taken into consideration in the model of the system, and the dynamic equation of motion is calculated by the modified Wilson-θ-based method. To analyze the unbalanced responses of the rotor system supported by finite length gas-lubricated journal bearings, such as bifurcation and chaos, the bifurcation diagram, the orbit diagram, the Poincaré map, the time series and the frequency spectrum are employed. The numerical results reveal that the nonlinear gas film forces have a significant influence on the stability of rotor system and there are the rich nonlinear phenomena, such as the periodic, period-doubling, quasi-periodic, period-4 and chaotic motion, and so on. The proposed models and numerical results can provide a theoretical direction to the design of axial-grooved gas-lubricated journal bearing-rotor system. | ZHANG Yongfang HEI Di Lü Yanjun WANG Quandai MüLLER Norbert | 2014 | Chinese Journal of Mechanical Engineering2014，27，2： | 9 |
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